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Debt Schedule of Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Current portion of debt $ 11,250 $ 11,250
Long-term debt 336,908 358,915
Secured Debt [Member]    
Debt Instrument [Line Items]    
Total debt 349,135 371,212
Current portion of debt 11,250 11,250
Long-term debt 336,908 358,915
USD Denominated Term Loan    
Debt Instrument [Line Items]    
USD denominated term loan 216,563 219,375
Deferred Finance Costs, Noncurrent, Net 977 1,047
Line of Credit [Member]    
Debt Instrument [Line Items]    
Multicurrency revolving line of credit 132,572 151,837
Deferred Finance Costs, Noncurrent, Net $ 2,951 $ 3,128